Tube punching apparatus



Oct. 25, 1932. v. c. NORQUIST 1,884,143

TUBE PUNCHING APPARATUS Filed July 2'7, 1929 2 Sheets-611%: l

A INVENTOR. Viczar (Z Mrr uisf M J2 Q Z ATTOR EY Oct. 25, 1932. v. c.NORQUIST TUBE PUNCHING APPARATUS 2 Shets-$heet 2 Filed July 27, 1929 R mE m w n aw A r. l V J Y B Patented Oct. 25, 1932 UNI-TED STATES PATENT-fOFFICE VICTOR o. NORQUIST, 01E KANSAS CITY, MISSOURI, ASSIGNOB TO BUTLERMANUFAOTUR- ING ooMPANY, OF KANSAS CITY, MISSOURI, A CORPORATION OF.MISSOURI TUBE PUNCHING AP PARJ-K'I'U'S Application med J'uly' 27, 1929.Serial No. 381,496.

This invention relates to improvements in tube ventilators for grain anda machine for making the same, and refers more particularly to themechanism or machine for mak- 5 ing the tubes, as tube ventilators ofthis character, comprising a hollow pipe perforated at intervals toallow air to pass through the body of the grain have been known and usedfor some time.

Among the important objects of the inventionare: to provide a machine bymeans of which the metallictubes can be perforated by projecting'therethrough a plunger upon which are mounted cutters which perforatethe tube at regular intervals; to provide a machine in which the plungermay be rotated so that it cuts the sets of perforations at relativelyequally spaced apart intervals by a single passage to the end of thetube and back to its original position.

Fig.1 is a diagrammatic side elevational view of the machine with partsbroken away. Fig. 2 is a view taken along the line 22 in Fig. 1. Fig. 3is a View taken along. a the line 3-3 in Fig. 2. Fig. 4 is a side viewof the clamp or mold portion in which the tube is held during theperforating operation. Fig. 5 is a side view of one of the'ventilatortubes with aportion near the center of the tube broken away. Fig. 6 is afragmentary view of the tube with parts in section. Fig. 7 is an endview of the tube Shown in Fig. 6.

Referring to the drawings, the machine consists of a channel memberwhich supports both the hydraulic or air cylinder and also the clampsfor the tube. This channel is held on suitable standards not shown.

Referring first to the plunger or cutter head which is forced throughthe tube or ventilator by means of a hydraulic or compressed aircylinder; the cylinder is designated in the drawings as 2. This cylindermay be a compressed air or hydraulic cylinder. In either case, the fluidunder pressure is supplied to the cylinder through a pipe 3 controlledby a throttle valve 4. The throttle valve is of such character that thecompressed fluid may be introduced into the cylinder at either end sothat the piston may be forced in either direction in the cylinder; Thepipes which are connected up to the cylinder have been broken away inthe drawings inthe interest of simplicity. Pipe 5 supplies fiuid to theopposite end of the cylinder, while pipe 6 serves as a supply pipe andpipe 7 as a discharge pipe. The cylinder is held In place on the channelmember 1 by means of clamps 8. I I

The piston rod attached to the hydraulic or. a1r piston extends throughthe frontof the cylinder through a packed joint not shown and isdesignated by the number 9. On this rod is mounted the plunger 10. Incutaway portions of-the plunger are positioned the cutter members 11.These cutter members are circular and have teeth 12 upon theiroutereperiphery which Serve to, cut the ;lots 513 in the ventilatortubes 14 shown in The cutout portions of the plunger are in diiferentplanes so that the cutters themselves lie in different planes relativeto the axis of the plunger and piston. Also there are two cutters 11 ineach cutout portion of theplung er,'the rotating axis of the two cuttersbeing offset from each other. so that one cutter contacts and cuts thesurface of the'tube diametrically opposite from the other cutterpositioned in the same cutout portion of the plunger. This eccentricarrangement is shown bestin Fig. 2 of the drawings The ventilatortubeswhich are to be perforated or slot-ted as shown in Fig. 5 are of a thinmetal such as galvanized iron. Down spout pipes are used, as they are oflow cost and are of the desired gauge of metal. These tubes or pipes areplaced between the upper and lower molds or clamps 13 and 14:, shown inFig. 3. To separate the mold, a lever15, which is an extension of theyoke member 16, is swung upon its pivots 17. This yoke through the bars18 moves the horizontal bars 19 which are in turn attached to theeccentric plates 20. These eccentric plates, near their upper ends, haveinclined slots 21 in which slide the pins 22. These pins are held inplace I on the top ofzthe mold member 14 by means of the plates 23 andbolts 24. The eccentric plates 20 are pivoted at the bottom of thechannels on the pins 25.

Along the side of the clamping portion of the machine is an inclinedchute 26 in which is rolled the extruding block 27. V

In operation, the lever 15, which is an extension of the yoke 16, ismoved so that the pins 22 slide into the lower end of the inclined slots21. As the pins 22 are rigidly fixed to the upper clamp or mold half 14,this portion of the mold is raised or separated from the lower portion18.

The tube or pipe is then inserted into the mold and the upper clamp ormold half lowered so that the pipe is held in position, as the insidediameter of the circular mold halves corresponds to the outer diameterof the pipe to be perforated. By means of the throttle 4 the plunger wihin the cylinder top is moved forwardly, forcing the plunger 10 to enterinto the hollow end of the tube 14. The plunger continues to advancethroughout the length of the tube. The cutters on the plunger are soarranged that perforations are cut on diametrically opposite sides ofthe tube in three different planes relative to the axis of the tube.

When the plunger has passed entirely through the tube and out throughthe opposite end, it is rotated through an angle of 45 or any othersuitable angle, by means of the lever 28, and then again withdrawnthrough the tube, at which time six more rows of perforations are madeby the cutter members, so that twelve rows of perforations are madethrough a single complete cycle of the plunger.

The mold or clamp members 13 and 14 are again separated by a thrust ofthe lever 15, and the extruding block 27 is fitted in the end of theplunger. This extruding block is of slightly larger diameter than theplunger and extrudes the perforated tube from the mold as the plunger isadvanced as in the cutting operation by the control throttle 4.

If :desired, there may be placed within the ventilator tube a separatetube such as that shown at 29. The use of the internal tube of thecharacter shown at 29, however, forms no part of the present invention.Such a tube is held in place by means of clamps shown at 30 in Fig. 7.

By the use of this machine, grain ventilating tubes may be perforated byprojecting the cutter through the tube and back to its original positionand rotating the cutter at the end of its stroke to position the cuttersrelative the tube so that the slots or perforations will be at regularintervals throughout its periphery.

- The tapered or pointed end portion 31 is fitted onto the end of thetubes to facilitate the insertion of the ventilator tubes into the bodyof the grain.

I claim as my invention:

1. Machine for making grain ventilators comprising a separable mold forholding the ventilator and having longitudinal troughs cut in theinterior surface thereof, a plunger insertable in the mold, circularperforation cutters mounted and rotated axially of the plunger andpositioned in different planes so that the perforated edges of thecutters coincide with the troughs in the mold.

2. Machine for making grain ventilators comprising a separable mold forholding the ventilator and having longitudinal troughs cut in theinterior surface thereof, a plunger insertable in the mold, circularperforation cutters mounted and rotated axially of the plunger andpositioned in different planes so that the perforated edges of thecutters coincide with the troughs in the mold, and means for rotatingthe plunger on its axis to position the cutters at different positionsrelative to the mold.

3. A machine for making perforated tubes, comprising a separable moldhaving longitudinal troughs cut in the interior surface thereof forholding the tube, a reciprocating ram rotatable upon its axis andinsertable in the mold, and perforation cutters on the ram adapted toperforate the tube upon insertion of the ram in the tube and movementthere along.

4. In a tube punching machine, areciprocating member adapted to bereciprocated within a tube, a plurality of rotatable members carried bythe reciprocating member, said rotatable members being disposed inplanes at an angle to each other and provided with punching elements,said elements adapted to perforate the tube upon movement of saidreciprocating member therealong.

5. In a tube punching machine, a reciprocating member adapted to bereciprocated within a tube, said reciprocating member being providedwith a recess, and a. plurality of rotatable members provided withpunching elements disposed in said recess, said punching elementsadapted to perforate said tube upon movement of said reciprocatingmember therealong.

' 6. In a tube punching machine, a reciprocating member adapted to bereciprocated within a tube, said reciprocating member being providedwith a recess, and a plurality of rotatable members provided withpunching elements disposed in eccentric relationship within said recessand adapted to perforate said tube upon movement of said reciprocatingmember therealong.

7. In a tube punching machine, a reciprocating member having a pluralityof recesses disposed in angular circumferential relationship, saidmember adapted to be reciprocated within a tube, rotatable membersdisposed in said recesses, said rotatable members being provided withpunching elements, adapted to perforate said tube u n movement ofsaidreciprocating member t erealong.

8. A machine as in claim 4 having a mold surrounding said tube forcooperation with said punching elements.

9. A machine as in claim 5 havin a mold surroundingsaid tube forcooperation with said punching elements.

10. A machine as in claim 6 having a mold surrounding said tube forcooperation with said punching elements.

7 11. A machine as in claim 7 having a mold surrounding said tube forcooperation with said punching elements.

VICTOR O. NORQUIST.

